probably look at:
bitseal https://github.com/JonathanCoe/bitseal
bitmessage http://www.xup.in/dl,28214889/Bitmessage_Android_1.32.1.apk/
but i have never tested anyone because of mostly all relevant mobile OS are insecure by design

1.5M$ for the full stack 0d on IOS proves the contrary
Sandboxes in place are better on smartphones actually.
To achieve that on a Desktop you need stuff like Qubes which rely on XEN which is also a shitty hypervisor.
Trust your smartphone, especially IOS ("Apple can push an update and pwn me" : same on all, especially in open source).
Note that you're right on a jailbroken device, it is as good as a Windows or any Linux kernel exposed without seccomp or else.